It completely depends on the person as loads of people have said but for me personally [I got 8 a stars and 5 as at GCSE] it was definitely ICT. A massive bunch of the course was easy peasy coursework then the exam I paid no attention in any class, didn't bother at ALL but managed to get 100% in the exam with just a couple hours of revision the day before.
not sure if I was lucky but that's how it worked out.English language was also really easy due to a load of waffle and a few quotes being considered a good exam essay technique... Though I think the standard of GCSEs is rubbish, I did mine in summer 2010 and the teachers and school go out of their way to keep the school's stats up.